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Help CenterCB/T3594-94 Marine Float Air Cap, Cast Iron/Bronze, DN50-DN200 Flanged, 10+ Years Experience, Mill Test Report Available
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Shanghai Zhibang Valve Manufacture Co., Ltd., a professional manufacturer established in 2016 with over 10 years of industry experience, proudly presents the CB/T3594-94 Marine Float Air Cap. This high-quality component is designed for reliable air release and vacuum prevention in shipboard piping systems. Available in cast iron or bronze, with flanged connections from DN50 to DN200, it meets the rigorous demands of marine environments. Every unit is backed by a Mill Test Report, ensuring traceability and performance verification.
Our float air caps are crafted to withstand corrosive seawater and harsh weather conditions, offering long service life and minimal maintenance. With annual export value exceeding US$1 million and a global customer base spanning North America, Europe, Asia, and beyond, we have built a reputation for consistent quality and on-time delivery. The CB/T3594-94 standard ensures interchangeability and compliance with Chinese marine industry requirements, making our product a trusted choice for shipbuilders and repair yards.
Product Features & Technical Specifications
- Superior Materials: Choose between durable cast iron for general applications or corrosion-resistant bronze for seawater systems.
- Flanged Connection: Standard PN10/16 flanges ensure easy installation and tight sealing, compatible with most marine pipelines.
- Size Range: DN50, DN65, DN80, DN100, DN125, DN150, DN200 – available for various flow rates.
- Automatic Float Mechanism: Reliable stainless steel float opens and closes air vent automatically, preventing air lock and vacuum damage.
- Mill Test Report: Each batch is inspected and supplied with a material certificate, verifying chemical composition and mechanical properties.
- ISO9001 Certified: Our manufacturing processes are audited and certified, ensuring consistent quality control.
| Nominal Size (DN) | Flange Outer Diameter (mm) | Bolt Hole Circle (mm) | Number of Bolt Holes | Bolt Hole Diameter (mm) | Approx. Weight (kg) |
|---|---|---|---|---|---|
| DN50 | 165 | 125 | 4 | 18 | 3.5 |
| DN80 | 200 | 160 | 8 | 18 | 5.2 |
| DN100 | 220 | 180 | 8 | 18 | 6.8 |
| DN150 | 285 | 240 | 8 | 22 | 10.5 |
| DN200 | 340 | 295 | 12 | 22 | 15.0 |
*Other sizes and pressure ratings are available upon request. Contact us for custom solutions.
Key Advantages for Your Marine Applications
- Enhanced Safety: Prevents dangerous air pockets in fuel, ballast, and cooling lines, reducing risk of equipment damage.
- Corrosion Resistance: Bronze option excels in saltwater environments, while cast iron is cost-effective for freshwater systems.
- Easy Maintenance: Simple top-cover design allows quick inspection and cleaning of the float without pipe disassembly.
- Long Service Life: Robust construction withstands vibration, pressure surges, and temperature variations typical on vessels.
- Global Compatibility: Flanges conform to international standards (PN16, ANSI optional), making integration easy in new builds or retrofits.
Why Choose Shanghai Zhibang Valve?
With over 10 years of specialized manufacturing experience, we have supplied thousands of marine float air caps to shipyards and shipping companies worldwide. Our factory is ISO9001 certified, and we maintain strict quality control from raw material incoming inspection to final pressure testing. Each shipment includes a Mill Test Report for full traceability. Our annual export value of US$1–1.5 million reflects the trust placed in us by customers in North America, South America, Europe, Africa, Oceania, and Asia.
We also offer flexible packaging options (wooden cases, pallets) and ship from Shanghai, Guangzhou, Hong Kong, or Beijing ports. Whether you need a single unit for a repair or a bulk order for a new vessel, our team provides responsive technical support and competitive pricing. Contact us today to request a quote or discuss your specific requirements.
Frequently Asked Questions (FAQ)
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Q: What is a Marine Float Air Cap used for?
A: It automatically releases air trapped in marine piping systems (e.g., fuel, ballast, cooling water) and prevents vacuum formation, ensuring smooth fluid flow and protecting pumps and tanks. -
Q: What is the difference between cast iron and bronze versions?
A: Cast iron is economical and suitable for non-corrosive freshwater applications. Bronze offers superior corrosion resistance in seawater and is recommended for saltwater systems. -
Q: Does this product comply with international standards?
A: It is manufactured per Chinese standard CB/T3594-94, which is widely accepted in the marine industry. Flanges can be supplied with PN16 or ANSI 150 drilling patterns upon request. -
Q: Is a Mill Test Report included?
A: Yes, a Mill Test Report (MTR) is provided with each shipment, detailing the chemical and mechanical properties of the materials used. -
Q: What sizes are available?
A: Standard sizes range from DN50 to DN200. Other sizes (e.g., DN250, DN300) and custom flange configurations are available upon request with a minimum order quantity. -
Q: How do I install and maintain the float air cap?
A: Installation is straightforward via bolting to a matching flange. Maintenance involves periodic cleaning of the float and seat; the top cover can be removed easily without disturbing the pipework. -
Q: Can I get a sample before placing a bulk order?
A: Yes, sample orders are welcome. We can provide a sample unit for testing at a nominal cost, which is refundable for bulk orders. -
Q: What is the typical lead time?
A: For standard sizes, lead time is 15–25 working days. Custom orders may require 30–40 days. We also offer express delivery for urgent needs.
Shanghai Zhibang Valve Manufacture Co., Ltd. – Your Reliable Partner in Marine Valves
Send Inquiry to This Supplier
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